Exploration
The Last Caretaker Mother Under the Sea: Where the Statue Is
Short answer: Mother Under the Sea is the Steam achievement for finding Mother, a statue on the sea floor about 200 m below Sanctuary Dock 37, where you start (11, 8 on the map). Stand outside the Sanctuary facing its big main door and follow the pipe on the left of the door all the way down; the statue stands where the pipe ends, and the achievement unlocks as you get close. That is far below the 110 m safe depth that full Pressure gives, so take power with you: a power cable from your boat or batteries, plus Charge Injectors. It is not the Mother quest.
Game version: Early Access, Update 6 (October 19, 2026)
What Mother Is and Where to Find It
What is Mother Under the Sea?
Mother Under the Sea is one of the game’s Steam achievements. Its one task: find Mother hidden below the waves.
Mother is a statue on the sea floor about 200 m below Sanctuary Dock 37, the dock where you start, at 11, 8 on the map. You need no quest to find it.
It is separate from the Mother quest. That quest takes you through three habitat nodes and ends at Habitat Node 38-98; the statue is a dive at your starting dock.
See also: the Mother quest
Where is the Mother statue?
Stand outside the Sanctuary facing its big main door. A pipe runs down the building on the left of the door and into the sea. Dive beside it and follow it all the way down: the statue stands where the pipe ends.
The achievement unlocks when you get close to the statue.
See also: Sanctuary Dock 37 on the map
Surviving the Dive to 200 m
How deep is the statue, and how do you survive it?
About 200 m is far below the safe depth any Caretaker can reach. Your safe depth starts at 10 m and each level of the Pressure enhancer adds 1 m, so even 100 levels stop at 110 m. Below your safe depth your battery drains much faster and your Vitality slowly drops, so the dive is a race against your power.
Put as many points into Pressure as you can, then take power down with you: plug a power cable from your boat into yourself before you dive, or carry a charged battery backpack and spare batteries. Charge Injectors, unlocked at Tier 4, turn battery power into Vitality, so bring several. Hold Crouch (Left Ctrl) to sink faster than swimming down.
You do not have to reach the sea floor: staying alive at about 180 to 190 m is enough to get close enough for the achievement.
See also: dive depth and Pressure · Enhancer planner
On the Way Back Up
Is there anything inside the pipe?
On the way back up, swim into the pipe instead of beside it; there is more to find inside.
There are ways into the pipe both at its foot and near the top, under water beside the building. A short passage near the top ends at some scrap and memories. The bend above the water that runs into the building is a dead end.
See also: what memories are for
